17-inch Color Monitor
C1770NSL/T
Service Manual
Страница 1: ...17 inch Color Monitor C1770NSL T Service Manual...
Страница 2: ...y electronic or machine readable form without prior written permission of LiteOn Technology Corp C1770NSL T Service Manual PrintedinTaiwan Trademarks LiteOn is a registered trademark of LiteOn Technol...
Страница 3: ...utions 2 2 Product Specifications 5 3 Operation Theory 10 4 AlignmentsandAdjustments 15 5 Troubleshooting 19 6 Recommended Spare Parts List 25 7 Block Diagram 27 8 ExplodedDiagrams Inserted 9 PCBDiagr...
Страница 4: ...ting never to exceed 1 1 2 Safety Checks Before returning the monitor to the user perform the following safety checks 1 Inspect to make certain that each lead dress is not pinched or that hardware is...
Страница 5: ...r installing any component or assembly disconnecting PCB plugs or connectors and connecting a test component in parallel with a capacitor 3 When replacing parts or circuit boards clamp the lead wires...
Страница 6: ...lar period 2 Test Setup a Test duration 3 seconds b Set current limit at 25 A c The grounding resistance must be less than 0 1 ohm 3 Test Procedure a Plug the monitor power cord to the tester terminal...
Страница 7: ...negative Synchronization Frequencies Horizontal 30 to 70 kHz Vertical 50 to 160 Hz Signal Connectors 15 pin D shell connector Video Signals Analog 0 7 Vp p RGB positive Power Input 75 Watts maximum AC...
Страница 8: ...ignal Pin Signal 1 Red video 9 5V 2 Green video 10 Digital Ground 3 Blue video 11 Ground 4 Ground 12 SDA 5 NC 13 H Sync 6 Red ground 14 V Sync VCL 7 Green ground 15 SCL 8 Blue ground Note This pin is...
Страница 9: ...8 53 67 60 02 63 98 68 68 Sync Polarity A pe riod us 31 78 26 666 23 111 21 333 18 63 16 66 15 63 14 56 B Blanking us 6 356 6 35 5 33 5 172 4 409 3 657 3 778 3 725 C Sync us 3 81 2 03 1 556 1 616 1 1...
Страница 10: ...ptional The monitor meets the TCO 95 99 NUTEK energy saving electric and magnetic field requirements Also it is compliant with TCO 95 TCO 99 labelling scheme The emission from magnetic and electric fi...
Страница 11: ...inated solvents among other things The monitor is also recyclable 3 Energy Requirements The monitor also follows the energy requirements that after a certain period of inactivity the monitor shall red...
Страница 12: ...fH 70 kHz 6 Full range AC input and simplified line filter design 3 2 Microcontrol Section 1 This monitor uses MYSON MTV212 M A 32 CPU It contains a 8051 8 bit CPU core 256 bytes of RAM used as worki...
Страница 13: ...ols 2 The scan current is determined by B minus Vm the voltage of C418 values and the pincushion control is accomplished by Darlington pair Q418 and Q419 by coupling a parabola waveform from pin 11 of...
Страница 14: ...l dynamic comes from I401 pin 32 through C315 R322 R326 R321 R323 Q301 R324 R325 and feed to FBT dynamic focus pin 3 4 Power Supply Section 3 4 1 AC Rectifier The circuit can accept 90 V to 264 V AC i...
Страница 15: ...s makes pin 3 of I801 is limited to have the OVP activated 3 4 8 O P P The excess current of T802 through I801 pin 1 2 make Vs 1 1V internal of I801 then limite the power 3 4 9 Step Up Power Supply Fo...
Страница 16: ...s are worked by positive vertical pulse from I701 pin 34 that goes through R720 to I502 pin 10 and positive horizontal pulse from T402 pin 5 goes through R496 to I502 pin 5 CPU I701 pin 13 12 I2 C bus...
Страница 17: ...meter Sanwa FD 750C or equivalent 2 30 kV high voltage probe HP34111A 3 Oscilloscope TEK2235 or equivalent 4 Minolta Color Analyzer II 5 Signal generator IBM PC with proper display cards or Chroma 200...
Страница 18: ...or and 563 5 at G2 1 b Adjust R and B cutoff to min 1 c Adjust G cutoff to about 0 45FL 1 d Adjust B cutoff to get y 280 5 R cutoff to get x 280 5 and Y 0 65 0 05 FL 1 e Adjust brightness cutoff to ra...
Страница 19: ...just focus 2 at T402 static focus VR to make horizontal line clear 4 Repeat above procedures to get best focus 4 2 4 Static Convergence Adjustments Static convergence involves alignment of the red blu...
Страница 20: ...t the field be gradually reduced by moving the coil slowly away from the monitor The degaussing coil must never be shut off or disconnected while near the monitor as this would introduce a strong fiel...
Страница 21: ...c Check I401 I703 R719 C741 R4F6 R4F5 R4C4 Check I801 R807 R808 Q801 Q802 ZD802 VR801 Check D801 D802 D803 D804 T801 R804 F801 Yes No Normal 68 V 31 5 kHz Short Circuit at load Measure voltage of B at...
Страница 22: ...hooting C1770NSL T 5 2 OSD Abnormal Put on I502 Replace them No Check I502 pin 9 4 is 5V and pin 5 10 7 8 missing Check R517 L514 R527 R523 R524 OK OSD Abnormal Yes No No Replace it Yes Yes Check P502...
Страница 23: ...ck I701 and I703 missing Power ON OFF again and check X701 oscillator OK Function Key Abnormal Yes No No Replace I703 or do ATE again Yes Replace I701 and check uP OK Yes Check I703 EEPROM content OK...
Страница 24: ...ontal line Ckeck or replace I301 Check R312 R307 R306 R313 Yes Check I301 voltage of pin 1 is 12V pin 4 is 12V pin 2 is 35V Check pin 5 O P waveform at I301 No Vertical Scan No Yes No Check pin 6 7 of...
Страница 25: ...pin 15 of I401 Check I401 pin 8 H output frequency pin 29 waveform Out of Horizontal Synchronization No Yes No Check Q401 T401 Q402 R424 D401 5 6 Out of Vertical Synchronization Check signal cable V...
Страница 26: ...C1770 series EEPROM DATA AUTO RELOAD The function allows plant staff to pre write and customer service personnel to use blank EEPROM through the pre write EEPROM function whenever the CPU is implemen...
Страница 27: ...ODE FE30 02BXF06 5 D810 6412004117 DIODE UF2004M 2A 200V 50 nS 6 D815 6412002617 DIODE UF3002M 3A 100V 50 nS 7 D817 6412024404 DIODE HER106 1A 600V 50 nS 8 F801 6851504053 FUSE TIME LAG H BRK 4A 250V...
Страница 28: ...P 5 UEI 29 R802 6221127852 MOF OHM 0 27 1W J HOR 30 R4E3 6221227852 MOF OHM 0 27 2W J HOR 31 T401 6135000801 XFRMER HOR DRIVE THD 1008A EI19 32 T402 6133070190 6133070200 FBT TFB 7019 FEA953 SAMPO S0...
Страница 29: ...T802 VERTICAL O P I301 BLANKING CKT BRIGHTNESS CONTROL SPOT KILLER H DRIVER BRIGHTNESS H OUT DIODE MODULATE FBT STEP UP CKT D Y XRP 80V 150V 650V 6 6KV 115V V V H H P502 P501 25 6KV VTTL GND VIDEO 5 V...
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Страница 36: ...LITE ON TECHNOLOGY CORP 5 F No 16 Sec 4 Nanking E Road Taipei Taiwan Tel 886 2 25706999 Fax 886 2 25706888 URL www liteontc com tw Printed in Taiwan...
